Power & shutdown

CURRENT_POWER_POLICY

What it is

Notifies the current power policy to VHAL layer.

Car power policy service sets this property when the current power policy is changed.

  string: "sample_policy_id" // power policy ID

How the ID is built

A property ID is a 32-bit value packing four fields. Reading 0x11100f23 apart:

Field	Mask	Value	Means
Group	0xf0000000	0x10000000	SYSTEM
Area	0x0f000000	0x01000000	GLOBAL
Type	0x00ff0000	0x00100000	STRING
Ordinal	0x0000ffff	0x00000f23	0xf23

Reading it from an app

CarPropertyManager mgr = (CarPropertyManager)
        car.getCarManager(Car.PROPERTY_SERVICE);

CarPropertyValue<String> value =
        mgr.getProperty(VehiclePropertyIds.CURRENT_POWER_POLICY, 0);

This property can be read and written, though an OEM may implement it as read-only. It fires a callback whenever the value changes.